Is peanut butter allowed in carry-on? Peanut butter may seem like a safe item since it's food, but the TSA considers a liquid so you're restricted to anything less than 3.4oz/100 ml allowed. You can still bring in jars, but it'll have to be less than the allowed limit.
Is butter allowed on flights?
Yes Of Course you can take it, but only in your check in luggage.
What kind of snacks can I bring on a plane?
Items allowed for travel in your carry-on include baby food, bread, candy, cereal, cheese, chocolate, coffee grounds, cooked meats, cookies, crackers, dried fruits, fresh eggs, meat, seafood, and vegetables, frozen foods, gravy, gum, honey, hummus, nuts, pizza, salt, sandwiches, and all sorts of dry snacks; even live
What can you not pack in your checked luggage?
9 Things You Should Never Pack in a Checked Bag